Valve-spring compressor



Dec. 9

A. L. SANDIN vVALVE SPRING C OMPRES S OR Filed March 27, '1924 Patented Dec. 9, 19214.

UNITED STATES ARTHUR L. SANDIN, t E BISMARK, NORTH AKOTA.

VALVE-SPRING COIEPRESSOP.

Application filed March 2?, 1924,

To all whom t 71mg/ concern Be it known that I. ARTHUR Il. Servern, a citizen of the United States, residing at Bismarck, in the count;r of Burleigh and State of North DakotaT have invented certain new and useful In'iprovements in Valve-spring Con'ipressors. of which the 'following is a specification, reference being had to the acconipanying drawings.

This invention relates to valve spring coinpressors and more particularly to an instrunient of this type adapted to simultaneously lift a pair of springs of adjacent valves, thus shortening and simplifying the operation of removing the springs from the valves to permit the same to be ground or removed.

A further and important object of the invention is to provide a device of this character so constructed that it is capable of use with that type of engine wherein between adjacent valve stems there is a lug or projection interfering with the insertion of the ordinary type of multiple valve spring lifting devices.

A still further object of the invention is to provide a device of this character in which the valve spring engaging portions are adjustably mounted to thereby permit their use with different types of engines the valves of which are dilferently spaced.

These and other objects I attain by the construction shown in the accompanying drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention and v-fherein:-

Figure 1 is a vertical sectional view showM ing a valve spring compressor, constructed in accordance with my invention.y applied to an engine to compress the springs thereof;

Figure 2 is a perspective view showing the construction of the lower end or spring lifting foot of the compressor:

Figure 3 is a perspective view of the valve head engaging plate;

Figure 1' is a detail view showing the manner in which the valve head engaging element engages the two adjacent valves of the engine.

Referring now more particularly to the drawings. the numeral 10 indicates a valve yoke constructed in two sections 11 and 12 adjustably connected together in any suitable manner. In the present instance I have shown the two sections as telescopically engaged, the section 11 or female section being formed in its outer wall with a slot 13 Serial No. 702,351.

and the section 12 having mounted therein a screw 14 which projects through the slotand the head of which en` es the section 11 at the side of the slot to maintain the adjusted position. The completed yole 10 is so formed as to bridge the manifolds of the vehicle in the usual manner. The upper inner end of the yoke has threaded therethrough a lever screw 15 the lower end of which is provided with a. swiveled elongated head 16 which is curved transversely as indicated.

The lower section 12 is provided with a transversely extending `flattened portion 1T of a desired length upon which are mounted valve spring engaging elements 18, each einbodying a yoke portion 19 slidably embracing one end of the extension 17 at one side of the lower yoke portion 12 and an outwardly extending spring seating portion 2O which lies immediately beneath the transverse swiveled head 1t' of the lever screw 15. This yoke portion. in each instance, is provided with a notch 21 for the reception of the stem of a valve the spring of which is to be compressed. The spring seating portions 20 are so constructed that their bottoni faces are flush with the under faces of the transverse portion 17 and the voire portions 19 thereof are provided in their upper surfaces with longitudinally extending slots 22 through which are directed clamping screws 23 engaged with the member 1'?. These slots permit adjustment. o ing members 18 tov r'd or away nn one another so that they' may be regulated to the proper distance between adjacent valve stems. It will be noted that, because of the engagement of the shank ofthe volte section 1Q, with the transverse bar 17 at the center thereof, these spring compressing portions 18 are maintained spaced troni one another at their adjacent edges7 this spacing peru'iitting the passa-ge of a lug or a rib formed Aupon and carried by the engine wall between adjacentvalve stems S.

In the use of the device, the adjacent valves the springs of which are to be compressed are so positioned that they are closed and the` valve spring compressing members 18 which have previously been adjusted to the pro-per spacing are engaged about the valve stems S bene-ath the spring seats there of. The lever screw 15 is then adjusted to bring the head 16 thereof into engagement with the upper surfaces of the valves, the

f the spring coinpress- Ji cinvature of this member l5 conforming to the curvature ordinarily applied to the upper surface of the valve so that it fits pirop-v erly thereagainst to hold the same against its seat. rThe tightening of the lever screw l5 is then. continued until the springs are compressed to the desired distance, that is to say, to point where the pins limiting the downward movement of the spring seats upon the valve stems S may be removed. Attention vis directed to the fact that since the under surface of the spring seat of the spring receiving portions of the spring compressing members i8 are flush with the under surface of the extension 17 of the yoke, there is nothing whatever to interfere with passage of the hand under this extension to permit tle lingers to engage with the pin of the valve stein to remove or replace: the same.

Particular attention is directed to the valve head engaging plate 1.6. This plate holds the valves against movement during compression of the springs so that proper alignment of the valve upon openings of the stems of the valves is assured. Due to the fact that this plate is curved in conformity to the curvature of the valve heads with which it is to engage, this friction is considerable and increases as the compression of the valve. spring increases. The necessity for such an engagement will be appreciated when it is pointed out that thestems of valves are often deformed or slightly upset due to the constant hammering to which they are subjected, and the valve spring seat in moving upwardly upon the valve has a tendency to bind thereon and often cause the valve to rotate where an insuiiicient grip between the member holding the. valve depressed and the valve head is had. This is entirely7 avoided by the construction illustrated and proper positioning of the stems at all times assured.

lt will furthermore be obvious that the construction hereinbefore set forth is capable of a. certain range of change and modivticatio-n without materially departing from the spirit of my invention and l accordingly do not limit myself to such specific structure except as: hereinafter claimed.

1. In a valve spring compressor, a manifold bridging yoke constructed in two 'adjustably connected sections having means for securing them in adjusted position, the. upper end of the yoke having a member adjustable therethrough andl provided at its lower end with a valve head engaging element adapted to simultaneously engage the heads of two adjacent valves, the lower end of the yoke being provided with a transverse extension having slidably mounted upon opposite ends thereof a. pair of valve spring compressing elements, means for securing thel con'ipressing elements in adjusted relation and with adjacent edges thereof spaced from one another, said valve spring compressing members each having a spring receiving portion having a notch for the reception of the stem of the valve.

2. In a valve spring compressor, a. manifold bridging yoke constructed in two adjustably connected sections having means for securing them in adjusted position, the upper end of the yoke having a member adjustable therethrough and provided at its lower end with a. valve head engaging element adapted to simultaneously engage the heads of two adjacent valves, the lower end of the yoke being provided with a, transverse extension having slidably mounted upon opposite ends thereof a pair of valve spring compressing elements, means for securing the compressing elements in adjusted relation and with adjacent edges thereof spaced from one another, said valve spring compressing members each having a spring re-` ceiving portion having a notch for the reception of the stem of the valve, the under surface of the valve head engaging element being curved to conform to the curvature of the upper surfaces of the valve heads to be engaged thereby, said valve spring compressing elements each comprising a member having a portion abutting the upper surface of the extension having at its sides portions abutting the side walls of the e-X- tension, one of said portions being provided at its lower edge with a valve spring seat, the other of said portions being provided with a. flange paralleling the rst named portion to maintain the valve spring compressing element in position upon the extension against the leverage exerted by the spring upon the spring seat.

ln testimony whereof I hereunto afx my signature.

ARTHUR L. SANDIN. 

